首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
外语
A Special Clock Every living thing has what scientists call a biological clock that controls behavior. The biological clock(5
A Special Clock Every living thing has what scientists call a biological clock that controls behavior. The biological clock(5
admin
2009-06-15
36
问题
A Special Clock
Every living thing has what scientists call a biological clock that controls behavior. The biological clock(51)plants when to form flowers and when the flowers should open. It tells insects when to(52) the protective cocoon (防护卵袋) and fly away, and it tells animals and human beings when to eat, sleep and wake.
Events outside the plant and animal(53)the actions of some biological clocks. Scientists recently found, for example, that a tiny animal changes the color of its fur because of the(54)of hours of daylight. In the short(55)of winter, its fur becomes white. The fur becomes gray brown in(56)in the longer hours of daylight in summer.
Inner signals control other(57)clocks. German scientists found that some kind of internal clock seems to order birds to begin their long migration(58)twice each year. Birds(59)from flying become restless when it is time for the trip,(60)they become calm again when the time of the flight has ended.
Scientists say they are beginning to learn which(61)of the brain contain biological clocks. An American researcher, Martin Moorhead, said a small group of cells near the front of the brain(62)to control the timing of some of our actions. These(63)tell a person when to wake, when to(64)and when to seek food. Scientists say there probably are other biological clock cells that(65)other body activities.
选项
A、ideas
B、parts
C、sorts
D、images
答案
B
解析
转载请注明原文地址:https://kaotiyun.com/show/Xi1d777K
本试题收录于:
职称英语卫生类B级题库职称英语分类
0
职称英语卫生类B级
职称英语
相关试题推荐
Readthefollowingarticleandanswerquestions19-25.Forquestions19-25,choosethecorrectanswerA,B,CorD.Mark
Readthefollowingpassage.Eightsentenceshavebeenremovedfromthearticle.ChoosefromthesentencesA~Htheonewhich
Readthefollowingpassage.Eightsentenceshavebeenremovedfromthearticle.ChoosefromthesentencesA~Htheonewhich
Readthefollowingpassageandanswerquestions9-18.1.Mostyoungpeopleenjoysomeformsofphysicalactivity.Itmaybewalk
Readthefollowingpassageandanswerquestions9-18.1.Ifsustainablecompetitiveadvantagedependsonwork-forceskills,Amer
Readthefollowingpassageandanswerquestions9-18.1.Ifsustainablecompetitiveadvantagedependsonwork-forceskills,Amer
Whatdoyouthinkofwhenyouhearthewordmotherhood?Ifyouarelikemostpeople,youassociatemotherhoodwithanumberofp
Whatdoyouthinkofwhenyouhearthewordmotherhood?Ifyouarelikemostpeople,youassociatemotherhoodwithanumberofp
Sportingactivitiesareessentiallymodifiedformsofhuntingbehavior.Viewedbiologically,themodernfootballerisrevealeda
Computerpeopletalkalotabouttheneedforotherpeopletobecome"computer-literate",inotherwords,tolearntounderstand
随机试题
关税是()
崩漏,经乱无期,伴有头晕耳鸣,腰膝酸软,五心烦热,舌红少苔,脉细数。其治法为
李某(女,26岁)是某县机关干部。某日,李某因有事骑自行车外出,晚上8点多钟还在赶回县城的路上。当她走到两个村庄之间的荒野时,一个强壮的农民(男,25岁)拿着一把铁锨站在路旁。强壮的农民借着月光看上了李某骑的自行车,这个农民拦下了李某,要求她把自行车留下。
初等义务教育普遍实施于【】
根据下图回答136~140题。2001~2004年间美国的经济增长速度,平均每年增加()
马克思主义原理的实际运用,随时随地都要以当时、当地的历史条件、现实条件为转移。这一论断
下列说法中,正确的是______。
SouthernLiteraturereferstoagroupofAmericanwritersinsouthAmericawithastrikingregionalistcharacteristicincluding
Jazzbeganintheearly20thcenturyasakindofmusicofblackAmericans.Itwas(36)______forsinging,fordancing,andfor
据报道,国务院(StateCouncil)将采取新的措施来促进我国健康服务业的发展。健康服务业涵盖医疗服务、健康管理、健康保险以及其他相关服务。这些措施包括简化审批程序,鼓励保险公司健康保险产品多样化,鼓励民间资本(privatecapital)进入医
最新回复
(
0
)